LiMgx Mn1-x PO4/C Cathodes for Lithium Batteries Prepared by a Combination of Spray Pyrolysis with Wet Ballmilling

Zhumabay Bakenov, Izumi Taniguchi

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

The LiMgx Mn1-x PO4/C (x=0, 0.02, 0.04, 0.12) composite cathode was successfully prepared by a combination of spray pyrolysis and wet ballmilling with heat-treatment. The composite cathode had narrow particle size distribution with an average particle size of 99 nm. The Mg doping on the Mn site led to the electrochemical performance enhancement of the composite cathode, which was confirmed by cyclic voltammetry, ac impedance spectroscopy, and charge-discharge tests. The Mg-doped composite cathode exhibited a high discharge capacity in lithium cell, which remarkably increased with an increase in the charge cutoff voltage under galvanostatic charge-discharge. The LiMg0.04 Mn0.96 PO4/C cathode exhibited a discharge capacity of 154 mAh g-1 (above 93% of the theoretical value) at 0.1C when charge-discharged galvanostatically to 4.9 V. Along with enhanced discharge capacity, the cell exhibited a good rate capability under the galvanostatic charge-discharge. Under the trickle mode conditions, the cell exhibited discharge capacities of 154, 136, 106, and 74 mAh g-1 at 0.05, 0.1, 1, and 5C, respectively.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume157
Issue number4
DOIs
Publication statusPublished - 2010
Externally publishedYes

Fingerprint

Spray pyrolysis
Lithium batteries
lithium batteries
pyrolysis
sprayers
Cathodes
cathodes
Composite materials
composite materials
cells
Lithium
Particle size analysis
Cyclic voltammetry
Particle size
Heat treatment
Doping (additives)
Spectroscopy
particle size distribution
heat treatment
cut-off

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

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title = "LiMgx Mn1-x PO4/C Cathodes for Lithium Batteries Prepared by a Combination of Spray Pyrolysis with Wet Ballmilling",
abstract = "The LiMgx Mn1-x PO4/C (x=0, 0.02, 0.04, 0.12) composite cathode was successfully prepared by a combination of spray pyrolysis and wet ballmilling with heat-treatment. The composite cathode had narrow particle size distribution with an average particle size of 99 nm. The Mg doping on the Mn site led to the electrochemical performance enhancement of the composite cathode, which was confirmed by cyclic voltammetry, ac impedance spectroscopy, and charge-discharge tests. The Mg-doped composite cathode exhibited a high discharge capacity in lithium cell, which remarkably increased with an increase in the charge cutoff voltage under galvanostatic charge-discharge. The LiMg0.04 Mn0.96 PO4/C cathode exhibited a discharge capacity of 154 mAh g-1 (above 93{\%} of the theoretical value) at 0.1C when charge-discharged galvanostatically to 4.9 V. Along with enhanced discharge capacity, the cell exhibited a good rate capability under the galvanostatic charge-discharge. Under the trickle mode conditions, the cell exhibited discharge capacities of 154, 136, 106, and 74 mAh g-1 at 0.05, 0.1, 1, and 5C, respectively.",
author = "Zhumabay Bakenov and Izumi Taniguchi",
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AB - The LiMgx Mn1-x PO4/C (x=0, 0.02, 0.04, 0.12) composite cathode was successfully prepared by a combination of spray pyrolysis and wet ballmilling with heat-treatment. The composite cathode had narrow particle size distribution with an average particle size of 99 nm. The Mg doping on the Mn site led to the electrochemical performance enhancement of the composite cathode, which was confirmed by cyclic voltammetry, ac impedance spectroscopy, and charge-discharge tests. The Mg-doped composite cathode exhibited a high discharge capacity in lithium cell, which remarkably increased with an increase in the charge cutoff voltage under galvanostatic charge-discharge. The LiMg0.04 Mn0.96 PO4/C cathode exhibited a discharge capacity of 154 mAh g-1 (above 93% of the theoretical value) at 0.1C when charge-discharged galvanostatically to 4.9 V. Along with enhanced discharge capacity, the cell exhibited a good rate capability under the galvanostatic charge-discharge. Under the trickle mode conditions, the cell exhibited discharge capacities of 154, 136, 106, and 74 mAh g-1 at 0.05, 0.1, 1, and 5C, respectively.

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